Linebacker Ray Lewis, who retired following his 17th season in Baltimore, and safety Ed Reed, who signed a free-agent deal with the Houston Texans in March after playing 11 seasons for the Ravens, are both expected to attend the festivities, which include a private ring ceremony on Friday at the Under Armour Performance Center in Owings Mills. Reed was pictured on the Ravens' Instagram account Wednesday morning boarding the team bus to Washington.

Reed had hip surgery in April and hasn't been able to participate in workouts with his new team.

Despite signing with the Miami Dolphins this offseason, linebacker Dannell Ellerbe, one of the unsung heroes of the Ravens' Super Bowl run, said on Twitter this morning that he will attend both the White House celebration and the ring ceremony.

"Ready to knock this practice out, pack my bags then hop this flight to B more for this White House visit and ring ceremony!," he wrote this morning.

Reserve linebacker and special teams standout Brendon Ayanbadejo, who was released this offseason, also is scheduled to attend along with the majority of the current Ravens who were on last year's Super Bowl roster.

The Ravens have their third and final session of organized team activities this week so a good part of the team is already in town.

However, there will be some noticeable absences, a list headed by wide receiver Anquan Boldin who was traded to the San Francisco 49ers in March. Boldin will stay in California to participate in OTAs with his new team, confirmed a Ravens' official.

"Unfortunately I'm going to miss a great opportunity to be with my Super Bowl team at the White House," Boldin said on his Twitter account. "I know those guys will proudly share our Super Bowl memories and unforgettable moments on my behalf."

Safety Bernard Pollard, now on the Tennessee Titans after being released by the Ravens, and linebacker Paul Kruger, who signed with the Cleveland Browns early in free agency, also won't be in attendance at the White House. Kruger, the Ravens' sack leader last year, is expected to attend Friday's ring ceremony.

Reserve safety Sean Considine, now a free agent, has a family obligation that will keep him from attending.

According to the Philadelphia Inquirer, Eagles quarterback Dennis Dixon, who was on the Ravens' practice squad for much of last season, and cornerback Cary Williams will also not attend the White House event. The Eagles have a minicamp this week and Williams, who started every game last year for the Ravens, has already gotten some criticism for missing some of the team's voluntary workouts under new coach Chip Kelly.

Mayor Stephanie Rawlings-Blake, meanwhile, won't be in attendance at the White House for the Ravens' ceremony. She spent Wednesday at the Yale CEO Summit at the New York Stock Exchange. The topic of the event was "Staying Ahead of Economic Currents: Building an Enterprise for the Future Despite Present Day Uncertainties." She will return to Baltimore Wednesday evening, her spokesman said.

Several local elected officials were able to attend the White House event. State Del. Keiffer J. Mitchell Jr., of Baltimore, and State Sen. Robert A. “Bobby” Zirkin, of Baltimore County, posed for a Twitter photo outside. City Councilman William H. Cole IV also was in attendance.

Sporting a purple tie, Howard County Executive Ken Ulman, who is Lt. Gov. Anthony Brown’s running mate in the 2014 race for governor, posed for a photo at the event with State Senate President Thomas V. “Mike” Miller Jr.